CN105159837A - Memory management method - Google Patents
Memory management method Download PDFInfo
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- CN105159837A CN105159837A CN201510515022.6A CN201510515022A CN105159837A CN 105159837 A CN105159837 A CN 105159837A CN 201510515022 A CN201510515022 A CN 201510515022A CN 105159837 A CN105159837 A CN 105159837A
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Abstract
The present invention discloses a memory management method. The method comprises: applying to acquire a memory cell; setting a structure of the memory cell, so that the memory cell comprises an adjacent cell pointer and a next hop pointer; setting a structure of a memory resource to which the memory cell belongs, so that the memory resource comprises an adjacent memory pointer, an active pointer, and a counting element; initializing an adjacent cell pointer of a memory cell comprised in the new memory resource, so that the memory cell comprised in the new memory resource is connected by using the adjacent cell pointer; adding the applied new memory resource to an existing memory resource linked list; initializing the new memory resource, and assigning a value of 0 to all memory cells comprised in the new memory resource; and calling the new memory resource to perform storage. By adopting the technical solutions, a memory can be flexibly expanded and released, thereby achieving an objective of using the memory resource efficiently.
Description
Technical field
The present invention relates to Computer Storage field, particularly relate to a kind of EMS memory management process.
Background technology
Hash generally translates again work " hash " or " Hash ", is a kind of storage organization, and the scene that large data storage and large discharge network data analysis etc. relate to fast finding generally all can use Hash to store.What use Hash to store is not generally single value, so in the scene using Hash to store, except hash units itself, generally also need the other storage unit depositing in another sheet region of memory.Each application scenarios is not constant to the behaviour in service of storage unit, needs to carry out dynamic change and adjustment according to actual conditions, such as, when large concurrent large discharge, storage unit takies some internal memories more, and when the free time, storage unit takies some internal memories less.
But, the at present EMS memory management process that relates to of the application scenarios of a lot of Hash, be all generally the storage unit using fixed size, the shortcoming of this method is apparent:
Not easily expand: because use the storage space of fixed size, even if under high-pressure situations, also can not expand because of storage unit and cannot apply for new free space and effective process can not be made to new request or response;
The wasting of resources: because use the storage space of fixed size, even if when idle, a large amount of internal storage location is all in non-working condition, also can cause the waste of ample resources because of discharging.
Summary of the invention
In view of this, the embodiment of the present invention proposes a kind of EMS memory management process, to realize the effective management to internal memory.
Embodiments provide a kind of EMS memory management process, comprising:
Application obtains storage unit;
Set the structure of described storage unit, described storage unit is comprised be used in reference to next idle storage unit adjacent unit pointer and be used in reference to the storage unit down hop pointer being in using state to the next one;
Set the structure of the memory source that described storage unit belongs to, described memory source is comprised be used in reference to next memory source adjacent memory pointer, be used in reference to the counter element enlivening pointer and record memory source access times to the first storage available of described memory source;
The adjacent unit pointer of the storage unit that memory source new described in initialization comprises, makes the storage unit comprised of described new memory source be connected by adjacent unit pointer;
The described new memory source applied for is added in the memory source chained list existed;
Memory source new described in initialization, the whole assignment of storage unit comprised by described new memory source is 0;
Call described new memory source to store.
By adopting technique scheme, when finding that Installed System Memory is not enough, can be the new storage unit of system application automatically, thus the object of flexible expansion internal memory can be issued in the situation of large use amount, effectively process large concurrent large discharge etc. and to happen suddenly scene.
Accompanying drawing explanation
By reading the detailed description done non-limiting example done with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
The schematic flow sheet of a kind of EMS memory management process that Fig. 1 provides for the embodiment of the present invention one;
The schematic flow sheet of a kind of EMS memory management process that Fig. 2 provides for the embodiment of the present invention two;
The schematic flow sheet of a kind of EMS memory management process that Fig. 3 provides for the embodiment of the present invention three;
The schematic flow sheet of a kind of EMS memory management process that Fig. 4 provides for the embodiment of the present invention four;
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.Be understandable that, specific embodiment described herein is only for explaining the present invention, but not limitation of the invention.It also should be noted that, for convenience of description, illustrate only part related to the present invention in accompanying drawing but not full content.
Before in further detail exemplary embodiment being discussed, it should be mentioned that some exemplary embodiments are described as the process or method described as process flow diagram.Although operations (or step) is described as the process of order by process flow diagram, many operations wherein can be implemented concurrently, concomitantly or simultaneously.In addition, the order of operations can be rearranged.Described process can be terminated when its operations are completed, but can also have the additional step do not comprised in the accompanying drawings.Described process can correspond to method, function, code, subroutine, subroutine etc.
Embodiment one
The schematic flow sheet of a kind of EMS memory management process that Fig. 1 provides for the embodiment of the present invention one.Situation about need expand storage space when the method for the present embodiment is not enough specifically for data space.The method can be performed by system, also can be performed by server.As shown in Figure 1, the method comprises:
S110, application obtain storage unit.
S120, set the structure of described storage unit, described storage unit is comprised be used in reference to next idle storage unit adjacent unit pointer and be used in reference to the storage unit down hop pointer being in using state to the next one; Set the structure of the memory source that described storage unit belongs to, described memory source is comprised be used in reference to next memory source adjacent memory pointer, be used in reference to the counter element enlivening pointer and record memory source access times to the first storage available of described memory source.
The structure of described storage unit can be buf{source, val, next_alive, prev, next}, and wherein, source is memory source pointer, points to the memory source that current memory cell belongs to; Val is the real object stored; Next_alive is adjacent unit pointer, points to next idle storage unit; Prev is previous dive pointer, points to previous also in the storage unit of using state; Next is down hop pointer, point to rear one also in the storage unit of using state.
The structure of described memory source can be source{buf, next, alive, use}, and wherein, buf is Storage Unit Pointer, points to the start address of the storage unit that this memory source comprises; Next is adjacent memory pointer, points to next memory source; Alive, for enlivening pointer, points to the first available storage unit of current memory resource; Use is counter element, the access times of record memory source, and often use the storage unit inside a memory source, counter element use adds 1.
The adjacent unit pointer of the storage unit that memory source new described in S130, initialization comprises, makes the storage unit comprised of described new memory source be connected by adjacent unit pointer.
The adjacent unit pointer of the storage unit that memory source new described in initialization comprises is specifically as follows: first apply for several storage unit and allow the Storage Unit Pointer in memory source point to the start address of storage unit, then using the adjacent unit pointer inside each storage unit to couple together before and after the storage unit of all applications.
S140, by application to described new memory source add in the memory source chained list existed.
The described new memory source applied for is added in the memory source chained list existed and can be realized by the pointer of memory source, is about to this new memory source of the adjacent memory pointers that there is memory source in using.
The described new memory source applied for can be added to the optional position in the middle of the reference position of the memory source chained list existed, end position or chained list.Preferably, can application to described new memory source add the end position of the memory source chained list existed to, namely allow the described new memory source that the adjacent memory pointers application of the memory source existed is arrived.New memory source is added to the storage order that ending place that there is memory source chained list can not upset the memory source chained list existed, adds fast more convenient, the system required step run when can reduce interpolation.
Memory source new described in S150, initialization, the whole assignment of storage unit comprised by described new memory source is 0.
During to the memory source that system application is new, original value inside memory source is likely more mixed and disorderly, so the memory source needing initialization newly to apply for, the whole assignment of storage unit comprised by the memory source newly applied for is 0, to facilitate follow-up calling and storing.
S160, call described new memory source and store.
Call described new memory source to carry out storage and can be: system calls first storage available inside this memory system by the pointer that enlivens of new memory source, then will the content stored be needed to write this storage available, when the storage content of this storage unit reaches in limited time, by the adjacent unit pointer of this storage unit find next idle storage unit to continue content that write needs to store until to have stored or the storage content of this memory source reaches the upper limit, in storing process, used storage unit is connected by previous dive pointer and/or down hop pointer.
The technical scheme of the present embodiment, the elements such as pointer have been distributed owing to giving the storage unit inside the memory source of new application and all new application memory sources, and the storage unit that this memory source and this memory source are comprised each other and and other memory sources existed of system, be connected by these pointer element between storage unit, so required memory source and/or storage unit can be found easily to carry out follow-up operation when storing, not only effectively can reduce the time that system carries out storing, and when large use amount, can exented memory neatly, effectively process the burst scenes such as large concurrent large discharge.
Embodiment two
The schematic flow sheet of a kind of EMS memory management process that Fig. 2 provides for the embodiment of the present invention two, the present embodiment with the addition of step on the basis of above-described embodiment: the write request accepting system; Inquire about already present current memory resource and whether there is idle storage available; If there is described storage available in described current memory resource, then from described current memory resource, obtain described storage available to store, otherwise, call next already present memory source, as current memory resource, return the step of described inquiry, until terminate inquiry when having inquired about all already present memory sources; If during poll-final, do not inquire storage available, then store to the memory source that system application is new.
Accordingly, the method for the present embodiment comprises the steps:
The write request of S210, receiving system.
Write request can be the input operation that the input equipment of system carries out, and also can be the storage application that some softwares that server or system are installed send.
S220, inquire about already present current memory resource and whether there is idle storage available, if there is described storage available in described current memory resource, then from described current memory resource, obtain described storage available to store, otherwise, call next already present memory source, as current memory resource, return the step of described inquiry, until terminate inquiry when having inquired about all already present memory sources.
Inquire about already present current memory resource whether to there is idle storage available and be specifically as follows: the maximum storage number of unit of first inquiring about this current memory source, then the counter element of this current memory source is called, judge whether the access times of this current memory source are less than the number of its maximum storage unit, if the access times of this current memory source are less than the number of its maximum storage unit, then illustrate that this current memory source exists idle storage available.
Call next already present memory source to be specifically as follows: the adjacent memory pointer calling current memory resource, judge whether its adjacent memory pointer has next memory source pointed to, if judged result is current memory resource there is the adjacent already present memory source of the next one, then call next already present memory source by the adjacent unit pointer of current memory resource, otherwise, terminate inquiry.
Preferably, if when there is described storage available in described current memory resource, the pointer that enlivens according to described current memory resource obtains corresponding described storage available, the access times of described current memory resource counting is added 1, the pointer that enlivens of described current memory resource is changed to next storage available pointed by the adjacent unit pointer pointing to described storage available, returns the described storage available of acquisition; If when described current memory resource does not exist the storage unit of described free time, the adjacent memory pointer according to described current memory resource obtains the corresponding already present memory source of the next one.
Wherein, described in return the described storage available of acquisition, comprising: the first object on the Hash position store the down hop pointed needs of described storage available, the first object upgraded on Hash position is described storage available.
If during S230 poll-final, do not inquire storage available, then store to the memory source that system application is new.
S240, application obtain storage unit;
S250, set the structure of described storage unit, described storage unit is comprised be used in reference to next idle storage unit adjacent unit pointer and be used in reference to the storage unit down hop pointer being in using state to the next one; Set the structure of the memory source that described storage unit belongs to, described memory source is comprised be used in reference to next memory source adjacent memory pointer, be used in reference to the counter element enlivening pointer and record memory source access times to the first storage available of described memory source;
The adjacent unit pointer of the storage unit that memory source new described in S260, initialization comprises, makes the storage unit comprised of described new memory source be connected by adjacent unit pointer;
S270, by application to described new memory source add in the memory source chained list existed;
Memory source new described in S280, initialization, the whole assignment of storage unit comprised by described new memory source is 0;
S290, call described new memory source and store.
The method of the managing internal memory that the present embodiment provides, before the memory source new to system application, first judge whether the memory source that system has existed exists idle storage unit, call this free memory locations when system exists idle storage unit to store, follow-up procedure to apply is carried out again when judgement system does not exist idle storage unit, so not only can there is the waste to memory source of free memory locations in minimizing system effectively, there is the utilization factor of memory source in raising system, and when large use amount, can exented memory neatly, effectively process the burst scenes such as large concurrent large discharge.
Embodiment three
The schematic flow sheet of a kind of EMS memory management process that Fig. 3 provides for the embodiment of the present invention three, the present embodiment, based on above-described embodiment, the basis of above-described embodiment adds step: search to find idle storage unit to be released; Locate the source memory source that described storage unit to be released belongs to; Discharge described storage unit to be released.
Accordingly, the method for the present embodiment comprises the steps:
S310, search to find idle storage unit to be released;
S320, locate the source memory source that described storage unit to be released belongs to;
Described source memory source refers to the memory source that described storage unit to be released belongs to, and locating the source memory source that described storage unit to be released belongs to can be realized by the memory source pointer of storage unit to be released.
S330, discharge described storage unit to be released.
Preferably, discharge described storage unit to be released to be specifically as follows:
According to the adjacent unit pointer of described unit to be released, judge whether described storage unit to be released has the storage unit of front and back sensing;
The storage unit pointed to before and after if described storage unit to be released exists, then allow the adjacent unit pointer of the storage unit pointed to before and after described storage unit to be released interrelated, described storage unit to be released is got rid of from corresponding Hash position, otherwise, described storage unit to be released is directly got rid of from corresponding Hash position;
By the storage unit enlivened pointed by pointer of source memory source described in the adjacent unit pointed of described storage unit to be released;
The pointer that enlivens of described source memory source is updated to the described storage unit to be released of sensing;
The access times of described source memory source counting is subtracted 1.
The method of the managing internal memory that the present embodiment provides, automatically searching and the step of releasing idling storage unit by increasing, internally can deposit into row and reclaiming, effectively can reduce the memory fragmentation of system, thus more efficiently use Installed System Memory under idle environment.
Embodiment four
The schematic flow sheet of a kind of EMS memory management process that Fig. 4 provides for the embodiment of the present invention four, the present embodiment adds following steps on the basis of above-described embodiment: judge whether described source memory source only has described storage unit to be released occupied according to the counter element of described memory source; If described source memory source only has described storage unit to be released occupied, then judge whether default allows to treat source memory source described in release; If described default allows release described source memory source, then discharge described source memory source.
Accordingly, the method for the present embodiment comprises the steps:
S410, search to find idle storage unit to be released;
S420, locate the source memory source that described storage unit to be released belongs to;
S430, discharge described storage unit to be released.
S440, judge whether described source memory source only has described storage unit to be released occupied according to the counter element of described memory source;
Judge whether described memory source only has that described storage unit to be released is occupied can be judged by the counter element of this memory source, if the use of this memory source is counted as 0, then illustrate that this memory source only has described storage unit to be released occupied, other storage unit of this memory source are idle storage unit; If the use counting of this memory source is not 0, then illustrate that this memory source also exists other occupied storage unit.
If S450 described source memory source only has described storage unit to be released occupied, then judge whether default allows to treat source memory source described in release;
If the described default of S460 allows release described source memory source, then discharge described source memory source.
Preferably, if described default allows release described source memory source, then described source memory source separated from the memory source chained list applied for and discharge, remaining memory source being formed a new memory source chained list.
Be specifically as follows: judge whether source memory source exists the storage resources of front and back sensing, the storage unit pointed to before and after if source memory source exists, then make an adjacent unit pointed memory source thereafter of its previous memory source, this source memory source is separated; The storage unit pointed to before or after if this source memory source does not exist, directly this source memory source is separated.
The EMS memory management process that the present embodiment provides, judge whether source memory source is the step that empty memory source determines whether discharging this memory source by increasing, can reclaim memory source under the environment of free time, effectively can solve the elastic demand needing under Hash is stored in the hyperbaric environments such as large concurrent large discharge internally to deposit into row expansion and need internally to deposit into row recovery under idle environment, use this EMS memory management process, effectively can not only improve the adaptability that Hash stores application scenarios, reduce the memory fragmentation produced, also more efficiently Installed System Memory can be used, and then effectively improve the efficiency of Hash storage.
Note, above are only preferred embodiment of the present invention and institute's application technology principle.Skilled person in the art will appreciate that and the invention is not restricted to specific embodiment described here, various obvious change can be carried out for a person skilled in the art, readjust and substitute and can not protection scope of the present invention be departed from.Therefore, although be described in further detail invention has been by above embodiment, the present invention is not limited only to above embodiment, when not departing from the present invention's design, can also comprise other Equivalent embodiments more, and scope of the present invention is determined by appended right.
Claims (8)
1. an EMS memory management process, is characterized in that, comprising:
Application obtains storage unit;
Set the structure of described storage unit, described storage unit is comprised be used in reference to next idle storage unit adjacent unit pointer and be used in reference to the storage unit down hop pointer being in using state to the next one;
Set the structure of the memory source that described storage unit belongs to, described memory source is comprised be used in reference to next memory source adjacent memory pointer, be used in reference to the counter element enlivening pointer and record memory source access times to the first storage available of described memory source;
The adjacent unit pointer of the storage unit that memory source new described in initialization comprises, the storage unit that described new memory source is comprised is connected by adjacent unit pointer;
The described new memory source applied for is added in the memory source chained list existed;
Memory source new described in initialization, the whole assignment of storage unit comprised by described new memory source is 0;
Call described new memory source to store.
2. method according to claim 1, is characterized in that, before described application obtains storage unit, also comprises:
The write request of receiving system;
Inquire about already present current memory resource and whether there is idle storage available;
If there is described storage available in described current memory resource, then from described current memory resource, obtain described storage available to store, otherwise, call next already present memory source, as current memory resource, return the step of described inquiry, until terminate inquiry when having inquired about all already present memory sources;
If during poll-final, do not inquire storage available, then store to the memory source that system application is new.
3. method according to claim 1, is characterized in that, calls after described new memory source stores, also comprise described:
Search to find idle storage unit to be released;
Locate the source memory source that described storage unit to be released belongs to;
Discharge described storage unit to be released.
4. method according to claim 2, it is characterized in that, if there is described storage available in described current memory resource, then from described current memory resource, obtain described storage available to store, otherwise call next already present memory source, as current memory resource, comprising:
If when there is described storage available in described current memory resource, the pointer that enlivens according to described current memory resource obtains corresponding described storage available, the access times of described current memory resource counting is added 1, the pointer that enlivens of described current memory resource is changed to next storage available pointed by the adjacent unit pointer pointing to described storage available, returns the described storage available of acquisition;
If when described current memory resource does not exist the storage unit of described free time, the adjacent memory pointer according to described current memory resource obtains the corresponding already present memory source of the next one.
5. method according to claim 4, is characterized in that, described in return the described storage available of acquisition, comprising:
The down hop pointed of described storage available is needed the first object on the Hash position of storage, the first object upgraded on Hash position is described storage available.
6. method according to claim 3, is characterized in that, after the described storage unit to be released of described release, also comprises:
Judge whether described source memory source only has described storage unit to be released occupied according to the counter element of described memory source;
If described source memory source only has described storage unit to be released occupied, then judge whether default allows to treat source memory source described in release;
If described default allows release described source memory source, then discharge described source memory source.
7. method according to claim 3, is characterized in that, the described storage unit to be released of described release, comprising:
According to the adjacent unit pointer of described unit to be released, judge whether described storage unit to be released has the storage unit of front and back sensing;
The storage unit pointed to before and after if described storage unit to be released exists, then allow the adjacent unit pointer of the storage unit pointed to before and after described storage unit to be released interrelated, described storage unit to be released is got rid of from corresponding Hash position, otherwise, described storage unit to be released is directly got rid of from corresponding Hash position;
By the storage unit enlivened pointed by pointer of source memory source described in the adjacent unit pointed of described storage unit to be released;
The pointer that enlivens of described source memory source is updated to the described storage unit to be released of sensing;
The access times of described source memory source counting is subtracted 1.
8. method according to claim 6, is characterized in that, described release described source memory source, comprising:
Described source memory source separated from the memory source chained list applied for and discharges, remaining memory source being formed a new memory source chained list.
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